Device for the production of granulate grains from a plastic melt
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United States of America Patent
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Jul 24, 2012
Grant Date -
Jun 10, 2010
app pub date -
Mar 5, 2008
filing date -
Mar 8, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a device for the production of granulate grains from a plastic melt, having a nozzle plate with at least one nozzle opening from which a strand of the plastic melt is discharged into a processing chamber, and a cutting tool having at least one cutting blade that may be moved against the nozzle plate by means of a feed device, wherein the plastic strand discharged from the nozzle opening of the nozzle plate can be fragmented into granulate grains by the cutting blade moving relative to the nozzle opening. The nozzle plate has a diamond coating at least on the surface thereof facing the cutting tool, with the hardness of the diamond coating being greater than the hardness of the cutting blade, and with the average roughness of the diamond coating being greater than the average roughness of the cutting blade by at least a factor of two.
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